166 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



riphery well rounded. Base moderately long, well rounded, and marked 

 by the continuation of the axial ribs, which pass undiminished over the 

 umbilical wall, and by seven spiral cords of the same strength as those 

 on the spire. The umbilicus is moderately broad and bears on its wall, 

 in addition to the ribs, eight spiral threads, which are a little stronger 

 than the rest. Aperture broadly oval; peristome double, the inner ex- 

 panded and reflected over and appressed to the outer. This is moderately 

 broadly expanded, somewhat auriculated at the posterior angle and 

 slightly flaring at the junction of the inner lip and the base. Operculum 

 with the nucleus halfway between marginal and central, bearing a 

 moderately elevated, obliquely flaring, expanded spiral lamella. 



The type (U.S.N. M. No. 504126) was collected by Mr. and Mrs, E. 

 C. Leonard near Palmiste, Tortue Island, Haiti. It has 4.8 whorls re- 

 maining and measures: Height, 14.0 mm.; greater diameter, 7.8 mm.; 

 lesser diameter, 6.0 mm. 



U.S.N.M. No. 504127, contains 11 topotypes. 



Still another lot of ten specimens, U.S.N.M. No. 504128, was col- 

 lected by the Leonards on the west side of La Valle, Tortue Island. 



TROSCHELVINDEX MIRAGOANENSIS, new species 



Plate 29, Figure 2 



Shell elongate-conic, rather slender, varying from flesh-color to pale 

 brown with interrupted spiral bands of brown, which conspicuously ray 

 the outer peristome. Nuclear whorls decollated in all our specimens. 

 Postnuclear whorls moderately well rounded and marked by strong sub- 

 lamellar axial ribs, which are slightly wavy, of which 74 are present on 

 the last turn. These riblets occasionally fuse to form slight tufts. Many 

 of them are expanded at the summit into slight auricles ; usually a strong 

 auriculated one is followed by a number of slightly smaller auricles, a 

 sequence which gives a peculiar pattern to the summit of the turns. The 

 spiral sculpture is indicated by 5 very elongate, feeble nodules on the 

 ribs, although it does not appear to be present in the intercostal spaces. 

 Suture quite strongly constricted. Periphery well rounded. Base rather 

 long and marked by an elongate thickening on the ribs. Umbilicus open 

 bearing 2 similar folds on the ribs near its outer edge. 



The type (U.S.N.M. No. 380104) was collected by W. J. Eyerdam 

 half a mile north of Miragoane, Haiti. It has 6 whorls remaining and 

 measures: Height, 12.8 mm.; greater diameter, 6.2 mm.; lesser diameter, 

 4.6 mm. 



U.S.N.M. No. 380364 contains 85 topotypes from the same source. 



U.S.N.M. No. 380068 contains 26 specimens from the top of Mount 

 Rochelois. 



The wavy ribs of this species will readily differentiate it from the three 

 others known from Haiti. 



